Audio listening system



FIG. 1 is a front perspective view of an audio listening system showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side perspective view of the earbud of an audio listening system showing our new design, shown separately for purposes of illustration;

FIG. 5 is left side perspective view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a front view thereof;

FIG. 8 is a right side view thereof; and,

FIG. 9 is a left side view thereof.

The broken lines within the Figures show portions of the audio listening system that form no part of the claimed design. 

CLAIM The ornamental design for an audio listening system, as shown and described. 